Chapter Four

One-page recap

Wrap-up

AI products are systems. The real craft now is shaping how intent, tools, evidence, and human judgment work together.

Good AI UX is decision architecture: clear intent, grounded context, enforced constraints, and visible validation.

StackShiftJudgment
IRevisit

System Stack

Separate model, context, tools, harness, and interface before you design or debug.

IIRevisit

Design Shift

Product shape moved from feature to copilot to agent to AI-native workflow.

IIIRevisit

Vibe Design

Design now owns intent, constraints, validation, and visible human control.